Detailed explanation of MSTP protocol for layer 3 switch configuration [Huawei ENSP experiment]

One , Preface

MSTP： Operate between the access layer switch and the convergence layer switch MSTP, Prevent the infinite circulation of data in the switching network, resulting in the paralysis of the switching network , It can also balance the load

In the last article, we have successfully configured the route / Three layer switch DHCP Distribution address . Now let's complete the three-layer switch configuration MSTP The task of the agreement .
The task requirements are as follows ：
8. To improve the reliability of the network , Each layer-2 access device needs to be interconnected with the convergence layer device , So you need to configure STP The protocol prevents the occurrence of loops on the basis of ensuring reliability .（ expand ）
10.MSTP、VRRP These technologies can be considered and implemented by students according to the situation .（ expand ）
Let's first look at the topology ：

Two , Example — Simple configuration MSTP agreement

The topology is as follows ：

First step lsw16 To configure

1. First create vlan

vlan batch 10 20

2. To 1 Port configuration

int eth 0/0/1

3. Configure the communication mode

port link-type access

Be careful ：

port default vlan 10

4. The other two ports

[sw1]port-group group-member Ethernet 0/0/2 to Ethernet 0/0/3

5. Configure to trunk

port link-type trunk

6. Run through all vlan

port trunk allow-pass vlan all

The second step lsw17 To configure

Same as above .
The only difference is ：
Be careful ：

port default vlan 20

Step 3: configure the convergence layer switch LSW18

1. First create vlan

vlan batch 10 20

2. grouping

port-group group-member GigabitEthernet 0/0/1 to GigabitEthernet 0/0/3

3. Configure to trunk

port link-type trunk

Output is as follows ：

[cour1-GigabitEthernet0/0/1]port link-type trunk 
[cour1-GigabitEthernet0/0/2]port link-type trunk 
[cour1-GigabitEthernet0/0/3]port link-type trunk 

4. Settings allow all vlan adopt

port trunk allow-pass vlan all

Step 4 configure the convergence layer switch LSW19

And the third step is to configure the convergence layer switch LSW18 Same steps .

Step 5 configuration mstp

stay sw10 in
Set up ：[sw10]stp mode mstp

stp mode mstp

Get into mstp View ：

stp region-configuration 

Set the name ：
[sw10-mst-region]region-name mstp

region-name mstp

Set version number
[sw10-mst-region]revision-level 0

revision-level 0

Divide into groups
[sw10-mst-region]instance 1 vlan 10
[sw10-mst-region]instance 2 vlan 20

instance 1 vlan 10
instance 2 vlan 20

Activate configuration ：
[sw10-mst-region]active region-configuration

active region-configuration 

Check the configuration ：
[sw10-mst-region]dis current-configuration

dis current-configuration

as follows mstp All configurations of ：

stp region-configuration
 region-name mstp
revision-level 0
 instance 1 vlan 10
 instance 2 vlan 20
 active region-configuration

The above steps are in sw16,17,18,19 Run once each .

see

see mstp

dis stp instance 1 brief

[sw1]dis stp instance 1 brief
 MSTID  Port                        Role  STP State     Protection
   1    Ethernet0/0/1               DESI  LEARNING        NONE
   1    Ethernet0/0/2               ROOT  FORWARDING      NONE
   1    Ethernet0/0/3               ALTE  DISCARDING      NONE

Convenient area ：

1. First create vlan
vlan batch 10 20
2. To 1 Port configuration
int eth 0/0/1
3. Configure the communication mode
port link-type access
port default vlan 10
4. The other two ports
[sw1]port-group group-member Ethernet 0/0/2 to Ethernet 0/0/3
Configure to trunk
port link-type trunk
Run through all vlan
port trunk allow-pass vlan all

Set up ：[sw10]stp mode mstp
Get into mstp View ：
[sw10]stp region-configuration
Set the name ：
[sw10-mst-region]region-name mstp
Set version number
[sw10-mst-region]revision-level 0
Divide into groups
[sw10-mst-region]instance 1 vlan 10
[sw10-mst-region]instance 2 vlan 20
Activate configuration ：
[sw10-mst-region]active region-configuration
Check the configuration ：
[sw10-mst-region]dis current-configuration
as follows mstp All configurations of ：
stp region-configuration
region-name mstp
revision-level 0
instance 1 vlan 10
instance 2 vlan 20
active region-configuration

 see mstp
dis stp instance 1 brief

3、 ... and . Curriculum - Layer 3 switch configuration MSTP agreement

Look at the topology ：

MSTP The agreement is still relatively simple .
Have a look first , What is? MSTP agreement ：
MSTP Multi region spanning tree protocol ：

Form trees without loops , Solve broadcast storm and realize redundant backup .
Multiple spanning trees in VLAN To achieve load balancing between , Different VLAN The traffic is forwarded in different paths .

Convergence layer ： First configure the layer 3 switch ：
LSW1 as follows ：

stp instance 1 root primary
stp instance 2 root secondary

LSW2 as follows ：

stp instance 2 root primary
stp instance 1 root secondary

explain ：LSW1 yes 1 The taproot of ,2 Spare root of .LSW2 yes 2 The taproot of ,1 Spare root of .

Get into stp region-configuration View ：
Set the name , Divide 1 and 2 Of vlan, Activate region-configuration

stp region-configuration
 region-name zhubo
 instance 1 vlan 10 20
 instance 2 vlan 30 40 50
 active region-configuration

see stp To configure

display stp brief

Switch layer ：
It has been configured before VLAN, So we're directly ：

stp region-configuration
 region-name zhubo
 instance 1 vlan 10 20
 instance 2 vlan 30 40 50
 active region-configuration

that will do .

The results are as follows ：

ping 192.168.10.253